1 /*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
33 * $FreeBSD: releng/9.2/sys/nfsclient/nfsm_subs.h 233285 2012-03-21 20:50:15Z jhb $
34 */
35
36 #ifndef _NFSCLIENT_NFSM_SUBS_H_
37 #define _NFSCLIENT_NFSM_SUBS_H_
38
39 #include <nfs/nfs_common.h>
40
41 #define nfsv2tov_type(a) nv2tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
42
43 struct ucred;
44 struct vnode;
45
46 /*
47 * These macros do strange and peculiar things to mbuf chains for
48 * the assistance of the nfs code. To attempt to use them for any
49 * other purpose will be dangerous. (they make weird assumptions)
50 */
51
52 /*
53 * First define what the actual subs. return
54 */
55 u_int32_t nfs_xid_gen(void);
56 struct mbuf *nfsm_reqhead(struct vnode *vp, u_long procid, int hsiz);
57
58 #define M_HASCL(m) ((m)->m_flags & M_EXT)
59 #define NFSMINOFF(m) \
60 do { \
61 if (M_HASCL(m)) \
62 (m)->m_data = (m)->m_ext.ext_buf; \
63 else if ((m)->m_flags & M_PKTHDR) \
64 (m)->m_data = (m)->m_pktdat; \
65 else \
66 (m)->m_data = (m)->m_dat; \
67 } while (0)
68 #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \
69 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
70
71 /*
72 * Now for the macros that do the simple stuff and call the functions
73 * for the hard stuff.
74 * These macros use several vars. declared in nfsm_reqhead and these
75 * vars. must not be used elsewhere unless you are careful not to corrupt
76 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
77 * that may be used so long as the value is not expected to retained
78 * after a macro.
79 * I know, this is kind of dorkey, but it makes the actual op functions
80 * fairly clean and deals with the mess caused by the xdr discriminating
81 * unions.
82 */
83
84
85 /* *********************************** */
86 /* Request generation phase macros */
87
88 int nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb,
89 caddr_t *bpos);
90 void nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
91 caddr_t *bpos);
92 int nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb,
93 caddr_t *bpos);
94
95 #define nfsm_bcheck(t1, mreq) \
96 do { \
97 if (t1) { \
98 error = t1; \
99 m_freem(mreq); \
100 goto nfsmout; \
101 } \
102 } while (0)
103
104 #define nfsm_fhtom(v, v3) \
105 do { \
106 int32_t t1; \
107 t1 = nfsm_fhtom_xx((v), (v3), &mb, &bpos); \
108 nfsm_bcheck(t1, mreq); \
109 } while (0)
110
111 /* If full is true, set all fields, otherwise just set mode and time fields */
112 #define nfsm_v3attrbuild(a, full) \
113 nfsm_v3attrbuild_xx(a, full, &mb, &bpos)
114
115 #define nfsm_uiotom(p, s) \
116 do { \
117 int t1; \
118 t1 = nfsm_uiotombuf((p), &mb, (s), &bpos); \
119 nfsm_bcheck(t1, mreq); \
120 } while (0)
121
122 #define nfsm_strtom(a, s, m) \
123 do { \
124 int t1; \
125 t1 = nfsm_strtom_xx((a), (s), (m), &mb, &bpos); \
126 nfsm_bcheck(t1, mreq); \
127 } while (0)
128
129 /* *********************************** */
130 /* Send the request */
131
132 #define nfsm_request(v, t, p, c) \
133 do { \
134 sigset_t oldset; \
135 nfs_set_sigmask(p, &oldset); \
136 error = nfs_request((v), mreq, (t), (p), (c), &mrep, &md, &dpos); \
137 nfs_restore_sigmask(p, &oldset); \
138 if (error != 0) { \
139 if (error & NFSERR_RETERR) \
140 error &= ~NFSERR_RETERR; \
141 else \
142 goto nfsmout; \
143 } \
144 } while (0)
145
146 /* *********************************** */
147 /* Reply interpretation phase macros */
148
149 int nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
150 struct mbuf **md, caddr_t *dpos);
151 int nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md,
152 caddr_t *dpos);
153 int nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
154 caddr_t *dpos);
155 int nfsm_postop_attr_xx(struct vnode **v, int *f, struct vattr *va,
156 struct mbuf **md, caddr_t *dpos);
157 int nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md,
158 caddr_t *dpos);
159
160 #define nfsm_mtofh(d, v, v3, f) \
161 do { \
162 int32_t t1; \
163 t1 = nfsm_mtofh_xx((d), &(v), (v3), &(f), &md, &dpos); \
164 nfsm_dcheck(t1, mrep); \
165 } while (0)
166
167 #define nfsm_getfh(f, s, v3) \
168 do { \
169 int32_t t1; \
170 t1 = nfsm_getfh_xx(&(f), &(s), (v3), &md, &dpos); \
171 nfsm_dcheck(t1, mrep); \
172 } while (0)
173
174 #define nfsm_loadattr(v, a) \
175 do { \
176 int32_t t1; \
177 t1 = nfsm_loadattr_xx(&v, a, &md, &dpos); \
178 nfsm_dcheck(t1, mrep); \
179 } while (0)
180
181 #define nfsm_postop_attr(v, f) \
182 do { \
183 int32_t t1; \
184 t1 = nfsm_postop_attr_xx(&v, &f, NULL, &md, &dpos); \
185 nfsm_dcheck(t1, mrep); \
186 } while (0)
187
188 #define nfsm_postop_attr_va(v, f, va) \
189 do { \
190 int32_t t1; \
191 t1 = nfsm_postop_attr_xx(&v, &f, va, &md, &dpos); \
192 nfsm_dcheck(t1, mrep); \
193 } while (0)
194
195 /* Used as (f) for nfsm_wcc_data() */
196 #define NFSV3_WCCRATTR 0
197 #define NFSV3_WCCCHK 1
198
199 #define nfsm_wcc_data(v, f) \
200 do { \
201 int32_t t1; \
202 t1 = nfsm_wcc_data_xx(&v, &f, &md, &dpos); \
203 nfsm_dcheck(t1, mrep); \
204 } while (0)
205
206 #endif
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